My just turned 4 year old DD asked me yesterday how babies get into their mother's tummy. I was taken completely by surprise and had no idea what to say. I told her I needed to think about how to explain it and she seemed happy with that. I am a big believer in being honest with kids but this has me really stumped on the best way to explain it to her, as the concepts are complicated. I would really love some advice on how to approach this with my 4 year old DD. If there are any good books too I would love to know about them. TIA!